{
  "manageEntity": {
    "action": "Create",
    "entityId": "1602931218",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"ooooh fire yo!\",\"entity_id\":687075632,\"track_timestamp_s\":47}}",
    "nonce": "0x349f517788e61c67c53adfe50ce9094410921d4063fe37493c49683ffa389a09",
    "signature": "0xdf4d8c173e7e8e9c0d473df1415f31980de218f718cd3ddeb9517b20b49a792a375601bd54ecbdca925ad94eef7541231da20bcaf9dd9b18db962f2c7e56267c1c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}